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Big Mouth (South Korean TV series)

Last edited: 2026-07-25 16:29 UTC Wikipedia originalHistory 한국어

2022 South Korean television series

Big Mouth
Promotional poster
Also known asBig Mouse[1][4]
Hangul
빅마우스
RRBingmauseu
MRPingmausŭ
Genre
Created by
Developed byKim Ho-jun (planning)[8]
Written byKim Ha-ram[9]
Directed by
Starring
Music byPark Se-joon[10]
Country of originSouth Korea
Original languageKorean
No. of episodes16
Production
Executive producerAhn In-yong[8]
Producers
  • Lee Sang-baek[8]
  • Kim Young-gyu[8]
Production companies
Budget₩30 billion[11]
Original release
NetworkMBC TV
ReleaseJuly 29 (2022-07-29) –
September 17, 2022 (2022-09-17)

Big Mouth (Korean: 빅마우스) is a 2022 South Korean television series starring Lee Jong-suk, Im Yoon-ah, and Kim Joo-hun. It aired on MBC TV from July 29 to September 17, 2022.[12][13] It is also available for streaming on Disney+ in selected regions.[14]

1. Synopsis

The series follows an underperforming lawyer caught in a murder case. To survive and protect his family, he uncovers a conspiracy among the upper classes.[3][12][15]

2. Cast

2.1. Main

A third-rate lawyer with a ten percent success rate, called "Big Mouth" by his legal acquaintances due to his tendency to speak before acting. His life is suddenly in danger when he is mistaken for a genius conman known as "Big Mouse".[1][16]
Chang-ho's supportive wife who is a nurse and has a bold personality but succumbs to cancer.[3][17]
The ambitious mayor of Gucheon, whose goal in life is to become the most dignified president.[18][19]

2.2. Supporting

2.2.1. NR Forum

The president of the media conglomerate Gukdong Daily and the chairman of the NR Forum.[18]
The director of Chilbong Academy.[20]
  • Lee Yoo-joon as Han Jae-ho
A surgeon.[21]
  • Oh Ryung as Lee Du-geun
Legal counsel of NR Forum.[20]
Managing director of OC Group.[20]
Head of the Department of Internal Medicine, Hematology and Oncology at Gucheon University Hospital.[20]
Jae-ho's wife who is a culinary researcher.[20][22]
  • Kim Kyu-seon as Ashley Kim
Ji-hoon's wife, who is a Korean-American and the director of Woojung Gallery.[23]
A prosecutor at Gucheon Public Prosecutors' Office.[20]

2.2.2. Gucheon Hospital

Do-ha's wife who is the director of Gucheon Hospital.[18]
  • Kim Seon-hwa as Park Mi-young
The head nurse at Gucheon Hospital.[24]
A nurse at Gucheon Hospital.[20]

2.2.3. Gucheon Prison

  • Jeong Jae-sung as Park Yoon-gap
The prison warden of Gucheon Prison.[25]
  • Kim Dong-won as Gan Su-cheol
A prison officer at Gucheon Prison.[26]
A scammer with three previous convictions who respects the genius conman "Big Mouse".[18][27]
  • Yang Hyung-wook as Noh Park
A prisoner at Gucheon Prison.[28]

2.2.4. People around Chang-ho

Mi-ho's father.[28]
A lawyer who is Chang-ho's best friend and assistant.[29]

2.3. Extended

  • Yoo Tae-ju as Tak Kwang-yeon
A psychopath death row inmate at Gucheon Prison.[30][31]
  • Song Kyung-cheol as Yang Chun-sik
A gang leader.[32]
  • Park Jeong-bok as Go Tae-sik
A prisoner at Gucheon Prison.[33]

2.4. Special appearances

3. Production and release

It was reported that filming was scheduled to start in the second half of 2021, with a budget of ₩30 billion.[11][19]

Big Mouth was initially confirmed to be released on tvN.[12] However, in April 2022, it was announced that the series would air on MBC TV's newly established Fridays and Saturdays time slot instead, in July.[38]

4. Original soundtrack

4.1. Part 1

Released on August 6, 2022 (2022-08-06)[39]
No.TitleLyricsMusicArtistLength
1."Brand New"Justhis
  • Woo Ji-hun
  • Park Se-joon
Justhis2:51
2."Brand New" (Inst.) 
  • Woo Ji-hun
  • Park Se-joon
 2:51
Total length:5:42

5. Viewership

Big Mouth : South Korea viewers per episode (millions)
SeasonEpisode numberAverage
12345678910111213141516
11.1241.1291.4311.6851.7321.9511.9771.8882.0081.7712.0542.2281.5341.9602.1452.5271.822
Source: Audience measurement performed nationwide by Nielsen Korea.[40]
Average TV viewership ratings
Ep. Original broadcast date Average audience share
Nielsen Korea[40] TNmS[41]
Nationwide Seoul Nationwide
1 July 29, 2022 6.2% (7th) 6.3% (7th) 5.6% (10th)
2 July 30, 2022 6.1% (5th) 6.4% (4th) 6.1% (7th)
3 August 5, 2022 7.6% (4th) 8.1% (4th) 8.1% (5th)
4 August 6, 2022 8.6% (2nd) 8.7% (2nd) N/A
5 August 12, 2022 9.8% (4th) 10.0% (3rd) 9.6% (4th)
6 August 13, 2022 10.8% (2nd) 10.8% (2nd) 10.0% (2nd)
7 August 19, 2022 11.2% (3rd) 11.4% (3rd) 10.1% (4th)
8 August 20, 2022 10.4% (2nd) 10.3% (2nd) 9.6% (2nd)
9 August 26, 2022 11.5% (2nd) 11.7% (2nd) 11.0% (2nd)
10 August 27, 2022 10.0% (2nd) 10.2% (2nd) 9.4% (2nd)
11 September 2, 2022 11.4% (4th) 11.4% (3rd) 11.2% (4th)
12 September 3, 2022 12.0% (2nd) 12.0% (2nd) 11.4% (2nd)
13 September 9, 2022 8.3% (4th) 8.3% (4th) N/A
14 September 10, 2022 10.6% (2nd) 10.3% (2nd) 10.1% (2nd)
15 September 16, 2022 12.3% (3rd) 12.4% (3rd) 10.5% (3rd)
16 September 17, 2022 13.7% (2nd) 13.9% (2nd) 12.5% (2nd)
Average 10.0% 10.1% 9.7[2]
  • In the table above, the blue numbers represent the lowest ratings and the red numbers represent the highest ratings.
  • N/A denotes ratings that were not released.

6. Awards and nominations

Award ceremony Year Category Nominee(s) / Work Result Ref.
MBC Drama Awards 2022 Grand Prize (Daesang) Lee Jong-suk Won [42]
Drama of the Year Big Mouth Won
Top Excellence Award, Actor in a Miniseries Lee Jong-suk Nominated
Top Excellence Award, Actress in a Miniseries Im Yoon-ah Won
Best Couple Award Lee Jong-suk and Im Yoon-ah Won

Notes

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Related articles

This article is based on the Wikipedia article “Big Mouth (South Korean TV series)”, licensed under CC BY-SA 4.0. See the edit history for the list of contributors. Image credits appear under each image.